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Blue objects in the field of M31

✍ Scribed by G. Romano

Publisher
Springer Netherlands
Year
1976
Tongue
English
Weight
135 KB
Volume
44
Category
Article
ISSN
0004-640X

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## Abstract 36 objects with mainly negative (__Uβ€”B__) indices were investigated for variability and proper motions. 10 objects with significant or suspected proper motions and 8 variable objects were detected. Using these criteria, it was possible to separate white dwarfs from quasi‐stellar objects